Heinz Engl, Andreas Neubauer,
"Convergence rates for Tikhonov regularization in finite-dimensional subspaces of Hilbert scales"
, in Proceedings of the American Mathematical Society, Vol. 102, Seite(n) 587-592, 1-1988, ISSN: 0002-9939
Original Titel:
Convergence rates for Tikhonov regularization in finite-dimensional subspaces of Hilbert scales